Food Chain and Food Web
What is at the bottom of the food chain?
plants
What organism makes their own food?
producer
TRUE OR FALSE
Biodiversity refers to the number of different types of living and nonliving members in an ecosystem or habitat.
TRUE
What is never a predator?
plants (producers)
Why were the wolves of Yellowstone National Park first exterminated?
The wolves were seen as a threat
Every living thing linked to other living things by what it eats and what it's eaten by is a ________ .
Food Chain
Where do consumers get their energy from?
by consuming other living things
What is the definition of ecosystem?
All the biotic factors organisms and the abiotic factors that make up the environment (community) in a given area.
Two organisms fighting for the same resource
competition
What happened to the elk population in Yellowstone National Park when the wolves were exterminated?
The population increased (nearly doubled)
Where is an apex predator generally found in a food chain?
top of the food chain
What type of consumer only eats plants?
herbivore
What is the difference between biotic and abiotic factors in an ecosystem?
biotic are living things and abiotic are non-living things
When one organism benefits from the relationship and the other organism is harmed...
parasitism
According to what we learned from YNP, what happens to an ecosystem when a member of that system is removed?
The ecosystem suffers. It is no longer in balance.
Most animals eat more than one type of animal/plant and this forms a network of interlocking chains called a _______.
Food Web
What type of consumer only eats other animals (consumers)...just meat?
carnivore
When concentrations of chemicals increase up through the food chain this process is called
biomagnification
Interactions between different organisms where one always benefits
symbiosis
List three things that happened to YNP when the wolves were absent from the park. Be specific.
Elk population increased, vegatation decreased (leaves, bushes, grasses, etc), bees and hummingbirds had fewer flowers to feed on, erosion made the Yellowstone River muddy, small mammels had less places to hide, bears didn't have berries to help with their hibernation.
In an energy pryamid or food web, how much energy is usually tranferred from prey to predator?
10%
What type of consumer eats both plants and other animals?
omnivore
List 3 reasons why high biodiversity matters to humans
air & water purification
climate regulation
erosion prevention
fossil fuels
medicine resources
food
building supplies
When one organism benefits while the other is unaffected
commensalism
Provide 3 specific incidents that happened in the Yellowstone National Park ecosystem with the return of the wolves. *BE SPECIFIC
Songbirds returned for nests, hummingbirds & bees had flowers to gather nectar from, river water flowed clear, small mammals had grass to hide in, beavers had trees to build dams with, bears had berries to eat for hibernation preparation, more food for scavengers to eat, and the elk population decreased.